I'm trying to figure out why some posts are coming through on the lj RSS feed with lj-cuts working and some aren't. Yours didn't -- can you tell me what the lj-cut code looked like from your side?
Also, if you want to try to make them work (which would be nice, because you do some of the longest posts) posting in rich text mode and doing the lj cuts there seems to work, according to xdoop.